Suggestions by @robertwaynecarroll

Rupert Penry-Jones

as Mayor Don Mitchell Jr. in THE BATMAN II

David Harbour

as Harvey Bullock in TASK FORCE X

Rory McCann

as Solomon Grundy in TASK FORCE X

Elijah Wright

as James Gordon Jr in TASK FORCE X

Ethan Winters

as Ethan Winters in GAME HOUSE

Pit (Kid Icarus)

as Pit in GAME HOUSE

Jago

as Jago in GAME HOUSE

Footman Spinal (Killer Instinct)

as Jago in GAME HOUSE

Knuckles

as Knuckles in GAME HOUSE

Link

as Link in GAME HOUSE

Anthony Starr

as Reverse Flash (Eobard Thawne) in The Flash

Ezra Miller

as The Flash (Barry Allen) in The Flash

Hailee Steinfeld

as Huntress (Helena Bertinelli) in BATGIRL

Tanner Buchanan

as BATMAN (Dick Grayson) in TASK FORCE X

Benedict Cumberbatch

as Doctor Strange (Stephen Strange) (Post-Credits Scene) in The Thunderbolts

Benedict Wong

as Wong (Post-Credits Scene) in The Thunderbolts

Mark Ruffalo

as Bruce Banner (Post-Credits Scene) in The Thunderbolts

William Sadler

as President Matthew Ellis in The Thunderbolts

Jin Sakai

as Jin Sakai in GAME HOUSE

Lucia Caminos

as Lucia Caminos in GAME HOUSE